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Polymer-Titanium hybrids obtained by radical polymerization and Sol-Gel process

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Central European Journal of Chemistry

Abstract

The possibility to prepare hybrids made by poly(vinyl acetate) (PVAc), poly(methyl methacrylate) (PMMA) and/or poly(ethyl acrylate) (PEtA) with TiO2 was studied. The processes of polymer formation-radical polymerization and sol-gel process for inorganic network —were achieved simultaneously. Due to a high reactivity of titanium isopropoxide (TIP) in the sol-gel process, a complexant comonomer, allyl acetoacetate (AlAcAc), was used. Covalent bonds between polymer and inorganic chains were obtained by addition of trialkoxysilane derivates with vinyl (VTES) or methacryloyl (MPTS) groups. The presence of TIP inhibits the radical polymerization of vinyl acetate (VAc). The PVAc-TiO2 hybrids were produced by the sol-gel process of TIP in the presence of pre-obtained PVAc. Except for VTES and MPTS, trialkoxysilane derivates with methyl (MeTES), octyl (OTES) and phenyl (PTES) groups were used. The thermal stability of hybrids is strongly affected by TiO2 presence and by the type of trialkoxysilane derivates. The thermal stability of PVAc hybrids decreases in the presence of TiO2 inorganic network. The glass transition temperature of polymers increases in the presence of the inorganic network.

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Authors and Affiliations

  1. Polymer Department, National R-D Institute for Chemistry and Petrochemistry, Splaiul Independentei 202, P.O. Box 15/159, Bucharest, sect. 6, Romania

    Dan Donescu, Sever Serban, Kristiana Gosa & Cristian Petcu

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  1. Dan Donescu
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  2. Sever Serban
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  3. Kristiana Gosa
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  4. Cristian Petcu
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Donescu, D., Serban, S., Gosa, K. et al. Polymer-Titanium hybrids obtained by radical polymerization and Sol-Gel process. cent.eur.j.chem. 3, 10–27 (2005). https://doi.org/10.2478/BF02476234

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  • DOI: https://doi.org/10.2478/BF02476234

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